/Engine/Source/Runtime/Engine/Classes/Engine/Texture.h
This is called optionally from worker threads via theFAsyncEncodeclass (LightMaps, ShadowMaps)
void CachePlatformData ( bool bAsyncCache, bool bAllowAsyncBuild, bool bAllowAsyncLoading, class [ITextureCompressorModule](API\Developer\TextureCompressor\ITextureCompressorModule) * Compressor )